This is just a small snippet of a terrible script found at Simply Scripts: http://www.simplyscripts.com/scripts/12feetdeep.html

(Sequence opens with a submarine in the deep waters of the Gulf of
Mexico. It is very dark, the submarine is barely visible and all that
can be clearly seen is the lights. The Narrator introduces the scene
with a dark voice over)

Narrator: For hundreds of year’s people thought creatures like the loch
ness monster were a hoax, guess what, they were wrong. Everybody likes
to think that they can believe what they see, but when they see what
they believe, it will be the last thing they will ever see.